Yung mga old operating system ni Android (Android 8 and below) ay di pa optimize ang management storage sa mga application. If your phone support various customized ROM, you may installed sa phone mo para wala ng bloatware at benefits din with free RAM and storage space.
If ayaw mo naman ng mag custom ROM, you may buy a microsd card, make your phone rooted (purpose nyan ay mag install ka ng apps na mag manage ng mga installed apps mo transferred to microsd).